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1 /* | 1 /* |
2 * Copyright 2013 Google Inc. | 2 * Copyright 2013 Google Inc. |
3 * | 3 * |
4 * Use of this source code is governed by a BSD-style license that can be | 4 * Use of this source code is governed by a BSD-style license that can be |
5 * found in the LICENSE file. | 5 * found in the LICENSE file. |
6 */ | 6 */ |
7 | 7 |
8 #ifndef SkImageInfo_DEFINED | 8 #ifndef SkImageInfo_DEFINED |
9 #define SkImageInfo_DEFINED | 9 #define SkImageInfo_DEFINED |
10 | 10 |
11 #include "SkTypes.h" | 11 #include "SkTypes.h" |
12 | 12 |
13 class SkFlattenableWriteBuffer; | |
14 class SkFlattenableReadBuffer; | |
15 | |
13 /** | 16 /** |
14 * Describes how to interpret the alpha compoent of a pixel. | 17 * Describes how to interpret the alpha compoent of a pixel. |
15 */ | 18 */ |
16 enum SkAlphaType { | 19 enum SkAlphaType { |
17 /** | 20 /** |
18 * All pixels should be treated as opaque, regardless of the value stored | 21 * All pixels should be treated as opaque, regardless of the value stored |
19 * in their alpha field. Used for legacy images that wrote 0 or garbarge | 22 * in their alpha field. Used for legacy images that wrote 0 or garbarge |
20 * in their alpha field, but intended the RGB to be treated as opaque. | 23 * in their alpha field, but intended the RGB to be treated as opaque. |
21 */ | 24 */ |
22 kIgnore_SkAlphaType, | 25 kIgnore_SkAlphaType, |
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56 } | 59 } |
57 | 60 |
58 /////////////////////////////////////////////////////////////////////////////// | 61 /////////////////////////////////////////////////////////////////////////////// |
59 | 62 |
60 /** | 63 /** |
61 * Describes how to interpret the components of a pixel. | 64 * Describes how to interpret the components of a pixel. |
62 */ | 65 */ |
63 enum SkColorType { | 66 enum SkColorType { |
64 kAlpha_8_SkColorType, | 67 kAlpha_8_SkColorType, |
65 kRGB_565_SkColorType, | 68 kRGB_565_SkColorType, |
69 kARGB_4444_SkColorType, | |
66 kRGBA_8888_SkColorType, | 70 kRGBA_8888_SkColorType, |
67 kBGRA_8888_SkColorType, | 71 kBGRA_8888_SkColorType, |
68 kIndex8_SkColorType, | 72 kIndex8_SkColorType, |
69 | 73 |
70 kLastEnum_SkColorType = kIndex8_SkColorType, | 74 kLastEnum_SkColorType = kIndex8_SkColorType, |
71 | 75 |
72 #if SK_PMCOLOR_BYTE_ORDER(B,G,R,A) | 76 #if SK_PMCOLOR_BYTE_ORDER(B,G,R,A) |
73 kPMColor_SkColorType = kBGRA_8888_SkColorType | 77 kPMColor_SkColorType = kBGRA_8888_SkColorType |
74 #elif SK_PMCOLOR_BYTE_ORDER(R,G,B,A) | 78 #elif SK_PMCOLOR_BYTE_ORDER(R,G,B,A) |
75 kPMColor_SkColorType = kRGBA_8888_SkColorType | 79 kPMColor_SkColorType = kRGBA_8888_SkColorType |
76 #else | 80 #else |
77 #error "SK_*32_SHFIT values must correspond to BGRA or RGBA byte order" | 81 #error "SK_*32_SHFIT values must correspond to BGRA or RGBA byte order" |
78 #endif | 82 #endif |
79 }; | 83 }; |
80 | 84 |
81 static int SkColorTypeBytesPerPixel(SkColorType ct) { | 85 static int SkColorTypeBytesPerPixel(SkColorType ct) { |
82 static const uint8_t gSize[] = { | 86 static const uint8_t gSize[] = { |
83 1, // Alpha_8 | 87 1, // Alpha_8 |
84 2, // RGB_565 | 88 2, // RGB_565 |
89 2, // ARGB_4444 | |
85 4, // RGBA_8888 | 90 4, // RGBA_8888 |
86 4, // BGRA_8888 | 91 4, // BGRA_8888 |
87 1, // kIndex_8 | 92 1, // kIndex_8 |
88 }; | 93 }; |
89 SK_COMPILE_ASSERT(SK_ARRAY_COUNT(gSize) == (size_t)(kLastEnum_SkColorType + 1), | 94 SK_COMPILE_ASSERT(SK_ARRAY_COUNT(gSize) == (size_t)(kLastEnum_SkColorType + 1), |
90 size_mismatch_with_SkColorType_enum); | 95 size_mismatch_with_SkColorType_enum); |
91 | 96 |
92 SkASSERT((size_t)ct < SK_ARRAY_COUNT(gSize)); | 97 SkASSERT((size_t)ct < SK_ARRAY_COUNT(gSize)); |
93 return gSize[ct]; | 98 return gSize[ct]; |
94 } | 99 } |
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105 SkAlphaType fAlphaType; | 110 SkAlphaType fAlphaType; |
106 | 111 |
107 bool isOpaque() const { | 112 bool isOpaque() const { |
108 return SkAlphaTypeIsOpaque(fAlphaType); | 113 return SkAlphaTypeIsOpaque(fAlphaType); |
109 } | 114 } |
110 | 115 |
111 int bytesPerPixel() const { | 116 int bytesPerPixel() const { |
112 return SkColorTypeBytesPerPixel(fColorType); | 117 return SkColorTypeBytesPerPixel(fColorType); |
113 } | 118 } |
114 | 119 |
120 size_t minRowBytes() const { | |
121 return fWidth * this->bytesPerPixel(); | |
122 } | |
123 | |
115 bool operator==(const SkImageInfo& other) const { | 124 bool operator==(const SkImageInfo& other) const { |
116 return 0 == memcmp(this, &other, sizeof(other)); | 125 return 0 == memcmp(this, &other, sizeof(other)); |
117 } | 126 } |
118 bool operator!=(const SkImageInfo& other) const { | 127 bool operator!=(const SkImageInfo& other) const { |
119 return 0 != memcmp(this, &other, sizeof(other)); | 128 return 0 != memcmp(this, &other, sizeof(other)); |
120 } | 129 } |
130 | |
131 void unflatten(SkFlattenableReadBuffer&); | |
132 void flatten(SkFlattenableWriteBuffer&) const; | |
133 | |
134 size_t getSafeSize(size_t rowBytes) const { | |
135 if (0 == fHeight) { | |
136 return 0; | |
137 } | |
138 return (fHeight - 1) * rowBytes + | |
139 fWidth * SkColorTypeBytesPerPixel(fColorType); | |
scroggo
2013/12/06 14:50:33
Should this call bytesPerPixel?
reed1
2013/12/06 15:48:46
Doh! Done.
| |
140 } | |
121 }; | 141 }; |
122 | 142 |
123 #endif | 143 #endif |
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